import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from "../components/Login";
import Home from "../components/home"

Vue.use(VueRouter)

const routes = [
  {path: '/', redirect: '/login'},
  {path: '/login', component: Login},
  {path: '/home', component: Home}
]

const router = new VueRouter({
  routes
})

// 挂在路由导航守卫
router.beforeEach((to, from, next) => {
  // to 将要访问的路径
  // from 代表从哪个路径跳转而来
  // next 是一个函数，表示放行
  //   next() 放行 next('/login') 强制跳转
  if (to.path === '/login') return next()
  // 获取 token
  const tokenStr = window.sessionStorage.getItem('token')
  if (!tokenStr) return next('/login')
  next();
})

export default router
